SOD2 and polycystic ovary syndrome: Several oxidative stress-related enzyme gene variants included platelet-activating factor acetyl hydrolase (PAF-AH) G994→T and paraoxonase (PON) 1 Q192→R, superoxide dismutase 2 (SOD2) V16→A, glutathione peroxidase 1 (GPX1) P198→L, myeloperoxidase (MPO) G-463→A, cytochrome P450 2E1 (CYP2E1) C-1054→T variants are genetic risk factors for PCOS [14–19].